RDMA_REG_MSGS(3) Librdmacm Programmer's Manual RDMA_REG_MSGS(3)
rdma_reg_msgs - register data buffer(s) for sending or receiving messages.
#include <rdma/rdma_verbs.h> struct ibv_mr * rdma_reg_msgs (struct rdma_cm_id *id, void *addr, size_t length);
id A reference to a communication identifier where the message buffer(s) will be used. addr The address of the memory buffer(s) to register. length The total length of the memory to register.
Registers an array of memory buffers used for sending and receiving messages or for RDMA operations. Memory buffers registered using rdma_reg_msgs may be posted to an rdma_cm_id using rdma_post_send or rdma_post_recv, or specified as the target of an RDMA read operation or the source of an RDMA write request.
Returns a reference to the registered memory region on success, or NULL on error. If an error occurs, errno will be set to indicate the failure reason.
rdma_reg_msgs is used to register an array of data buffers that will be used send and/or receive messages on a queue pair associated with an rdma_cm_id. The memory buffer is registered with the proteection domain associated with the idenfier. The start of the data buffer array is specified through the addr parameter, and the total size of the array is given by length. All data buffers should be registered before being posted as a work request. Users must deregister all registered memory by calling rdma_dereg_mr.
rdma_cm(7), rdma_create_id(3), rdma_create_ep(3), rdma_reg_read(3), rdma_reg_write(3), ibv_reg_mr(3), ibv_dereg_mr(3), rdma_post_send(3), rdma_post_recv(3), rdma_post_read(3), rdma_post_readv(3), rdma_post_write(3), rdma_post_writev(3)
This page is part of the rdma-core (RDMA Core Userspace Libraries and Daemons) project. Information about the project can be found at ⟨https://github.com/linux-rdma/rdma-core⟩. If you have a bug report for this manual page, send it to email@example.com. This page was obtained from the project's upstream Git repository ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2021-08-27. (At that time, the date of the most recent commit that was found in the repository was 2021-08-18.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to firstname.lastname@example.org librdmacm 2010-07-19 RDMA_REG_MSGS(3)
Pages that refer to this page: rdma_dereg_mr(3), rdma_post_read(3), rdma_post_readv(3), rdma_post_ud_send(3), rdma_post_write(3), rdma_post_writev(3), rdma_reg_read(3), rdma_reg_write(3), rdma_cm(7)